Combination ignition lock



March 12, 1935. J. w. BENNETT COMBINATION IGNITION LOCK Filed June 2l, 1954 2 Sheets-Sheet 1 i "um 'I4 /NVf/VTOR w BEN/V577.

March 12, 1935. J, W, BENNETT 1,994,240

COMBINATION IGNITION LOCK Filed June 2l, 1934 2 Sheets-Sheet 2 yvm ,9 Tron/VE YJ.

Patented Mar. 12, 1935 UNITED STATES" PATENT oFfrlcE 1,994,240 COMBINATIN IGNITION LOCK John WesleyBennett, Oshawa, Ontario; Canada Application June 21, 1934, Serial No.'731,665

8 Claims. (Cl.-'70`53) VMy invention relates to improvements in combination ignition locks, and the object of the invention is to devise a positive lock of this type which is easily operated and-Which cannot be tampered with, and -it consists essentially of the arrangementand construction of parts as hereinafterV more particularly explained.

Fig. 1 is a perspective view of my lock.

Fig. 2 is a cross sectional view through the lock showing the parts in position to prevent the operation of the ignition key. v

Fig. 3 is a similar view to Fig. 2 showing the parts in the position to permit the operation of the ignition key. Y

Fig. 4 is a sectional plan on line 4 4 Fig. 2.

Fig. 5 is a sectional plan on line 5 5 Fig. 2.

Fig. 6 is a sectional plan on line 6-6 Fig. 2.

FigJ? is a sectional plan` taken on the plain of the lock casing face.

Fig. 8 is a sectional plan View similar to Fig. 6

showing the parts in position to permit the engaging of the operating stem andV key stem.

Fig. 9 is a perspective detail of one ofthe locking discs. Y

l0 /is a perspective detail of the member connecting the operating stem With the graduated dial coacting therewith; f

Fig. 11 is a perspective detail of the key stem.

Fig. 12 is a perspective detail of the operating Stem. 1 j

tral portions of Figs. 2 and 3. Figs. 15 and 16 are enlarged sectionalviews similar to Figs. 2 and 3 but looking in the opposite direction. f 5

In the drawings likeicharacters of reference indicate corresponding parts in each figure.

Figs. 13 and 14' are enlargedl details'of the cen-r v 1 and 2 are inner and outer discs provided with central circular recesses 1X and 2x forming a chamber. 201 are a plurality of Vrecesses arranged around the main recess 2X and slightly overlapping the same as clearly indicated in Fig. 5. 3 is an orice extending through the plate 2. Centrally of each recess 2,0 isv an oriiice 3 extending through the plate 2 and in axial alignment with each orice 3 is an orice SXin the plate 1. The plates 1 and 2 are secured together by screws 4.

5 are short shafts journalled in the aligned orifices 3 and 3X; Each shaft is provided with a disc 5X fitting the corresponding recess 2, Vthe periphery thereof overlapping the main recess 2X, Each disc 5X is provided Withjan edge recess 50, the edgeof Which-coincides With'the edge of the recess 2X. 6 is a tongue extending from the edge of the disc centrally of each recess 5.

7 is a cylindrical casing enclosing the discs 1 and 2 .provided With orices 7X through each v01 which extends a threaded extension 5 of the 5 shaft 5.on which is screwed'a knurled nut 8 for operating the shaft 5.- 9 is an annular disc suitably graduated and fitting on the threaded portion 5 so as to shoulder against the end ofthe same and be clamped thereon by the nut 8 to turn with the shaft 5. Each disc 9 may rit into ka recess formed in the face of the cover 7.

Thelmain recesses 1X and 2X are provided with central orices 10 and 11 having annular.re. cessed edges 1()x and 11X. l 12 and 13 are cylindrical members extending respectively through the orifices 10 and 11 and provided at their innerV ends with annular flanges 12X and 13X tting the annular recesses 10X and 11X.

14 are pins extending from theV inner end of the member `12 at diametrically opposite sides of a central guiding pin'15. The member 12 passes through the orifice 10 so as to project from the disc 1 and is provided with anV annular groove 12 in which is sprung a split ring 16 against the face of the'disc 1 securing the parts together. The member 12 is provided with a diametric Vslot 12 in which is secured a key 17 by means of a rivet 17X (see Fig. 11).. The member 13 is cylindrical and provided with an annular flange 13K-fitting the edge recess 11x and from which .extend pins 13 longitudinally opvposite the pins 111. The sleeve 13 is provided at its opposite end with a threaded extension 13' which, When the parts are assembled, projects 35 through the disc 2.

18 is an annular disc suitably graduated and clamped in place against the member 13 by a sleeve nut 191screwed onto the portion 13'; 20 is a rotatable stern extending through the member 13 and provided at its inner end with a disc 20X. 21 is a projection extendinginvlard from the upper edge of the recess 2X. 221s a notch formed in the edge of the disc 20X and through 'which the projection 21 passes when the stem 20 is moved longitudinally. The remaining notches 23 correv spond in position to the projections 6 When set rafdially to the centre of the main recess 2X. The oppositeend o1" the stem 20 is provided with a reduced threaded portion 24.011 which is screwed a knurled nut by which the stem 20 is manually rotated. The disc 2()X is provided With a limiting slot 26 into Which a projection-27 extending from the baseothe recess 1X extends. The height of the pin 27 corresponds to the thickness of the 55 disc 20X. 28 is a central orice into which the guiding pin extends and 29 are orices located on diametrically opposite sides of the central orice 28 in which the pins 13 and 14 engage alternately.

When the parts are in the position shown in Fig. 2 the disc 20X is turned freely within the recess 2x by means of the knurled nut 25, the member 13 being also turned by means of the pins 13 located' in the oriiices 29 together with the disc 18 which is clamped to the member 13 by the nut 19. Unless the operator knows the combination nothing further can take place and the key 1'7 cannot be operated.

If it is desired to engage the key 17 to operate the ignition lock, thel disc 18is set so that the combination number is opposite the; pointer 30. This operation carries the notch 22 opposite the projection 21. The knurled nuts 8 are then turned to carry their combination numbers opposite to their'respective indicating pointers 31 bringing the tongues 6 opposite to the notches 23 previously located in the required position by setting of the notch 22 opposite the tongue projection 21.

When the combination is thus set the `operator presses upon the nut` 2,5 carrying the stem 2O and disc 20X inward from the position illustrated in Figs. Zand 13 so that the orices 29 almost clear the pins 13o and engage the pins 14, the tongues 21 and 6 passing through the notches`22 and23 so asto assume the position illustrated in Figs. 3

and 14. Simultaneously the projection 27 ,enters the slot 26 so as to limit its turning movement. When'the parts are so positioned the turning of f the nut 25 rotates the stem 20, disc20X and key stem 12 connected to the disc 28X by the pins 14 to operate the key 17 toopen or close the ignition lock. 'I'he rotation of the disc 20X is limited to turn between these two positions by means of the slot 26 coacting with the stop pin 27.

When the disc 20X is withdrawn to the position shown in Fig. 2 .it is 'turned so that the notch 22 is carried out of line with the projection 21 and th'ediscs 5x to the positions shown in Fig. 5 so as to overlap the disc 20x and prevent its longitudinal movement into engagement with the pins 14.

If it is desired to change the combination a suitable instrument is Apassed throughv the orifice 32 into engagement with the disc 2OX to prevent its rotation. The nuts 25 and 8 are then loosened and the discs 18 and 9 turned to any desired position to bring new numbers opposite to the pointers and 31. l From this description it will be seen .that I have'devised a very simple form of combination lock for ignition switches which can be easily engaged by pressing on the operating nut 25 when the combination is set and which nut can be freely turned when withdrawn and the combination in the unset position so that no ,engagement can vbe made by an unautho-rizedperson who does not known the combination.

What I claim as my` invention is:-

1. A combination ignition lock comprising a lock body, a rotatable key stem and a rotatable and longitudinally movable operating stem mounted in the body in axial alignment, a graduated d isc mountedconcentrically .with the operating stem, means for engaging the operating stem and disc when the stem is in the outward position and disengageable by the inward moveL ment of the stem, means for engaging the operating stem with the key stem when the operating stem is in the inward position, and means for `normally holding the operating stem outrof en'- 1,994,24o v s position and disengageable by the inward move# ment of the stem, means for engaging the operating stem with the key stem when the operating stem is in the inward position, means fornormally Vholding the operating stem out of engagement with thekey stem by the turning of the operating stem and disc to a predetermined position, and a plurality of graduated supplemental discs turnably mounted in the body to be set at any predetermined position and means coacting with the supplemental discs to release Athe operating stem to move ,longitudinally when inthe set position and to prevent such movement whenin the unset position.

3. A combination ignition lock,comprising.V a

lock body having a central chamber,a key stem and operating stem journalledgin oppositewalls of the chamber in axial alignment,fa disc Vcarried on the operating stem within-the chamber 4and having a plurality of edge notcheaa member mounted in the body concentricwiththe operating shaft and turnable therewith, pin projections extending fromV the innerend of such membeijtoY normally engage the notched disc, pins extendin-g from the keystem in axial alignment; withL the aforesaid pinsandadapted to engage the notched disc when sueh disc is moved-out,ofengagement with the pins of themember, 'and settable combination devices coacting with the notches o f the disc for permitting when in the set position the longitudinal movement ofthe dis/ c and operating shaft and preventing such movement when inthe unset position. -V

4. A combination ignition lock compr a lock body having a central chamber, a keyfstem and operatingstemjournalled in QPpOSite walls of the chamber in axial alignment, a disccarried on the operating` stem .within the chamberand having a plurality fof edge notches, anrnember mounted in the body concentric with the oper,-V ating shaft and turnable therewith,` pin projections extending from the inner endof suhmem'- ber to normally engage the notchedrdisc, pins extending from` the key stem axial alignment with the aforesaid pins and adapted to engage the notched disc when such discis moved out of engagement with the pinsofthe membenset table combinationv devices Vcoacting with the notches of the disc f orpermitting when the set position the longitudinal movement o f the disc and operating shaft and preventingsuch movement when in the unsetposi-tion, a g r`ad uated disc mounted concentric to the operatingv`v stem andturnable therewith, and a graduatedy dise,` coating with each combination'device aim turnable therewith. 5. A combination ignition lock comprising@ lock body having a central chamber, a key stem Y and operating stem journalled in opposite 'walls of the chamber in axial alignment, a'Ydis'c carried on the operating'y stem within -the chamber and having a plurality of edge notches; a member mounted in thebody concentricgwiththe operating shaft and turnable therewith,pinl pro.-

jections extending-from the. inneriend vnizsuch member to normally engage the notched disc, pins extending from the key stem in axial alignment with the aforesaid pins and adapted to engage the notched disc when such disc is moved out of engagement with the pins of the member, settable combination devices coacting with the notches of the disc for permitting when in the set position the longitudinal movement of the disc and operating shaft and preventing such movement when in the unset position, a graduated disc mounted concentric to the operating stem and releasably clamped thereto, and a graduated disc coacting with each combination device and releasably clamped thereto.

6. A combination ignition lock comprising a lock body having a central chamber, a key stem and operating stem journalled in opposite Walls of the chamber in axial alignment, a disc carried on the operating stem Within the chamber and having a plurality of edge notches, a projection extending from the Wall of the chamber adapted to pass through one of said notches when the disc and operating shaft are moved longitudinally, a member mounted in the body concentric With theoperating shaft and turnable therewith, pin projections extending from the inner end of such member to normally engage the notched disc, pins extending from the key stem in axial alignment with the aforesaid pins and adapted to engage the notched disc when such disc is moved out of engagement with the pins of the member, settable combination devices coacting with the notches of the disc for permitting when in the set position the longitudinal movement of the disc and operating shaft rand preventing such movement when in the unset position, such combination devices each comprisu ing a disc turnably mounted on the body and the projection of the body passes through its corresponding notch in the notched disc, a graduated disc mounted concentric to the operating stem and releasably clamped thereto, and a graduated disc coacting with each combination device and releasably clamped thereto.

7. A combination ignition lock comprising a lock body having a central chamber, a key stem and operating stem journalled in opposite walls of the chamber in axial alignment, a disc carried on the operating stem Within the chamber and having a plurality of edge notches, a member mounted in the body concentric with the operating shaft and turnable therewith, Ypin projections extending from the inner end of such member to normally engage the notched disc, pins extending from the key stem in axial alignment with the aforesaid pins and adapted to engage the notched disc when such disc is moved out of engagement with the pins of the member, settable combination devices coacting with the notches of the disc for permitting when in the set position the longitudinal movement of the disc and operating shaft and preventing such movement when in the unset position, means for limiting the turning movement of the operating stem when in engagement with .the key stem to correspond with turning limit of the key, such means comprising a projection extending from the bottom of the chamber, and an arc shaped slot in the notched disc into which the projection extends when the disc and key stem are in engagement.

8. In a combination ignition lock, a rotatable key Stem, a rotatable operating stem in axial alignment with the key stem, visible settable means coacting with the operating stem for indicating the engaging position of the operating stem with the key stem, and means for simultaneously engaging the set operating stem with the key stem and disengaging the operating stem from the indicating means.

JOI-IN WESLEY BENNETT. 

